Steve has given you some very good advice and that is what I would do. I might point out to you that no, not all balconies are capable of being triples. Yes they could put in a rollaway but you really wouldn't want that and you must remember that there is a set number of people that the ship can carry. It isn't a matter of fitting as many people onboard as they can, you cannot exceed the capacity of the dining rooms. As Steve said, this is a very popular sailing and the ship is oversold already so you may consider yourself lucky to even have a cabin. There are a number of us CM folks on this sailing, including many staff. Hopefully we can all get together while onboard for a nice meet and greet.